Draft-rigging.



PATENTED MAY 7, i907.

J. R. RENIFF.

DRAFT RIG-GING.

APPLICATION FILED 00T.29, 1906.

3 SHEETS-SHEET 1.

No. 852,801. PATENTED MAY 7, 1907.

J. R. RENIFF.

DRAFTv RIGGING.

APPLICATION HLED 00129. 1906.

s sEEETssHBBT 2.

No. 852,801. PATENTED MAY '7, 1907. J. R. RENIFF.

DRAFT RIGGING.

APPLIOATION FILED 00129. 1906.

3 SHEETS-SHEET 3.

1 character.

' a friction draft-rigging.

. engage each other, s

. View of one of the spli cross section ofthe same on the line 77 of UNITED STATES PATENT FFIQ.

JAMES R. RENIFF, or CHICAGO, ILLINOIS, Assienon or ONEHALF"'10" -E GBERT H. GOLD, OF CHICAGO, ILLINOIS.

DRAFT-RIGGING.

No. 852,801. Specification of Letters Patent. Patented May 7, 1907.

end a coupler-head 3. olted or otherwise secured to the draft-arms 1, 1 are brackets or lugs 4, 4and 5, 5, forming abutments for the followers. I Guide-plates 6, 6 arebolted to the under side of the ,brackets or lugs 4,4 and 5, 5 and support the parts of the draftrigging. Similar guide-plates 7, 7 are. bolted to-the upper si 5 and, in combination with 6, 6 maintain the follower plates 8 andv Qin position, permitting them to have movement longitudinally of the device or in a line par allel with the length of the car. the inner end ofthedraw -bar 2 and extend ing backwardly around the rear follower plate 8, is a strap or yoke 10. -Wh'en.a pull ing strain is exerted upon the draw-bar 2 the strap 10 will move thefollower plate 8 for ward against the resistance of the springs and other resisting means, and when a thrust or compressive strain is exerted upon the drawbar'2, the follower plate 9 will be moved backwardly or toward the follower plate 8 against the resistance 'of these springs and other means.

Between the follower plates 8 and 9 are arranged a pair of split friction-cases, one of To all whom it m/tg concern.- Be it known that I, JAMES R. RENI FF, a

citizen of the .UnitedStates, residing at Chicago, in' the county of Cook and State of Illinois, have invented certain new and useful Improvements in Draft-Rigging, of which the following is a specification. .l This invention relates toimpro vements in the guideplates The object of this invention is to provide a draft-rigging for cars in which shocks are absorbed by means adapted to frictionally coaid means being auxiliary to and supplementing the action of the springs ordinarily employed in devices of this Afurther object of my invention is the pro- .duction of an efficient device of the above outlined class which is of substantial construction, and, at the same time, not expensive to manufacture.

In the drawings accompanying this specification, Figure 1 is a plan view of a draftrigging "embodying my invention. Fig. 2-is a longitudinal section of the same, the section being taken on the line 22 of Fig. 1, looking in the direction indicated by the arrows. Fig. 3 is an enlarged cross-sectional view of the same, the section being taken on the line 3-3 of F'g. 2, looking in the direction indidated by the arrows. Fig. 4 is a perspective t cylindrical friction-v cases employed in the form of device shown in Figs. 1', 2 and. 3. Fig. 5 shows a cross section of the same parttaken 011 the line 5-5 of Fig. 4. Fig. 6 shows a longitudinal section of another form of draft-rigging embodying my invention. Fig. 7 shows an enlarged thrust within the other. The outer of these cases is split longitudinally into two parts 11, 12, the inner of these cases being similarly longitudinally split 'into two parts 13,

These friction-cases 11, 12 and 18, 14.- are, in the form of device shown in Figs. 1, 2, 3, 4 and 5, cy' drical inform. In the form of device shown in Figs. 6, 7 and 8 these friction-cases are given a rectangular form. In the device shown in Figs. 9 and 10 these cases are cylindrical and other forms are shown in Figs. 11,,12 nd 13-. The outer friction-casing "11, 12 is provided with winglike extensions 11*, 12*, these extensions being carried across the upper and lower sides of the members 11 and 12. The inner friction-casing is made convex at 8 where the follower plate 8 engages-the same. With n' the innerfriction-casing 1-3, 14. is a plate 15 having one of its sides slightly concaved and adapted to be thrust into contact with the inner side of the end of the casing 13, Ll. The opposite or inner side of this plate 15 is provided with'a lip 15 extending around the edge of the plate 15 and adapted to hold in proper positlon the buffing-spring 16. The

Fig. 6 looking in the direction indicated by the arrows. Fig. 8-shows in perspective the split rectangular friction-cases used in the form of the invention shown in Figs. 6 and 7. Fig. 9 is a longitudinal sectional view of a third form of device embodying my invention. Fig. 10 shows an enlarged cross section of the same on the line 1010 of ig. 9. Figs. 11, 12 and 13 are broken sectional views of further modifications of my invention.

Inthe several figures of the drawings 1 1 are the draft-beams or draftarms secured to' the bottom of the car and adapted to support the draft-rigging. v v

-2 indicates-the draw-bar having at its outer des of the brackets 4, 4 and 5,

these friction-cases being adapted to be" SecuredtO.

upon the plates 15 and 17.

When a pulling strain is exerted upon th draw-bar and IS transmitted from said drawbar through the strap or yoke to the rear follower plate 8, the forward movement of this follower plate 8 tends to open or spread the two halves 13 and 14 of the inner frictioncase. At the same time the resistance of the follower plate 9, which is, of course, prevent ed from having forward movement by the brackets 5, 5, tends to close the halves 11 and I 12 of the outer friction-case together. The

inner case 13, 14 and outer case 11, 12 are thus caused to frictionally engage each other so that the-movement of the first-named of these two cases into and toward the outer case 11, 12, is frictionally res sted. This action takes place because of the fact that the follower p ate 8 is in contact with theconvex rear end of the inner friction-case, engaging the same at a point substantially in line with its center, while, at the same time, the plate 15 engages the inner side of this case at its extreme upper and lower points, the result being that a leverage is exerted upon-the parts of this inner-case, tending to move the inner ends of the parts 13 and 14 aiart. At the same time the plate 17 is t. rust into contact with the inner convex surface 9 of the case 11, 12, while'the follower plate 9 engages the outer surface of the same at points above and below the point 9, the result being a leverage tending to press the parts 11 and 12 together and into con tact with the inner friction case.

When an inward thrust is given to the draw-bar 2 the strap 10 willmove away from the follower plate 8, while the pressure of the draw-bar upon the follower plate 9 will cause the latter to move inward or toward the follower plate 8. Whether the follower plate 8 be moved forward by an outward pull or the follower plate 9 be moved backward by an inward thrust of the draw-bar 2, the follower plates are caused to approach each other, and the action of the parts in resisting this movement is the same in either case.

It will be seen that, broadly considered, the opposite and separating parts of the friction cases are bent levers having each a fulcrum point and an end that receives at all times a thrust, this thrust being increased by the movement of the draw-bar in eitherdirection. The opposite ends of thesc levers are arranged to overlie each-other. the force lace a second tending to move the levers about their fulcrums being so applied as to movethese ends towardand into closer engagement with each other.. At the same time that these parts are pressed into. closer mutual contact they are moved bodily past each other. The friction between these arts and the consequent resistance ofiere to this lattermo ve- 'ment becomes greater as the'force applied increases,-'for the reason that the springs 16 and 18 exert more and morepressureupon the parts as these s rings are compressed.

In the form oft e device shown in Figs.

9 and 10 a third split friction case 19, 20 is 7 inserted into the case 11, 12. Within this inner case 19, 20 is a disk 21 against which are seated the springs. The edge of this disk 2]. is formed with an incline adapted to engage suitable inclines formed upon the inner sides of the parts 19 and 20; The pressure-of the springs 16 and 18 upon the wedge-disk 21 forces'th'e parts 19 and 20 apart and intocloser engagement with the parts 13 and '14. Interposed between the point 9 at which pressure is exerted upon the'ends .of the levers formed by the parts 11. and 12 and the endsof the parts 19 and 20 is a plate .22. Interposed between this plate and the wedge-disk 21 is a spring 23, adapted to move the wedge-disk '21-back when the pressure of the springs 16 and 18 is partly relieved by the'strain being taken volfthedevice. i

In Fig. 11 the device is shown in a modified form wherein the friction between the inner and outer friction-cases is increased by increasing the amount of surface in contact. In this form of the device the friction surfaces are of polygonal instead of circular cross-sectional form. In the form shown in Fig. 12 these surfaces are given a wave-line contour, while in. the form shown in Fig. 13

openings are provided in which rods 24 are 'and secured in place by bolts 27 as shown in the drawings.

I claim as my invention l. The combination with a draw-bar, of a yoke attached thereto, and a friction rigging arranged within said yoke and comprising a pair of levers arranged to overlap each other,

and means providing fulcrums for said. lei vers, all ,so arranged that the longitudinal movementof said draw-bar will move the overlapping ends of said levers toward iand into closer engagementwith each other.

2. The combination with a draw-bar of a yoke attached thereto and a friction rigging arran ed within said yoke-and comprising a pair levers arranged to overlap each other .dinal movement of. said draw-bar will move the overlapping ends of said levers toward andinto close-r engagement with each other.

3. The combination with a draw-bar of a yoke attached thereto and a friction rigging arranged within said yoke and comprising a crumsfor said levers all so arranged that the pair of levers having ends arranged to over lap each other and other ends subjected to yielding pressure, and means providing fullongitudinal movement of said draw-bar will impart greater pressure to the pressure-receiving ends of said levers and thereby move the overlapping ends of said levers into closer engagement with each other.

4. In a draft-rigging, the combination of a Y pair of followers, abutments for said followers, a pair of split friction-casesdisposed between said followers and adapted to telescope one within the other, and means for causing the friction-cases to frictionally engage each other when the followers are caused to approach each other, said means tending'to open the inner friction-case and to close the outer friction-case.

5. In a draft-rig ing, the combination of a pair of followers, aoutments for said followers, a pair of friction-cases disposed between the followers and. adapted to telescope one within the other, a spring wi thin said frictioncases tending to expand the inner of said friction-cases and. to cause the outer of said friction-cases to contract, and means whereby said spring may be compressed by the longitudinalmovement of the draft-rigging and thereby cau'sedto eXerta greater force as the followers are cat-sed to approach each other.

6. In a draft-rigging, the combination with a pair of followers and abutments therefor, of a pair ofsplit friction-cases disposed between said followers and adapted to slide one within the other as the followers approach each other, spring means tending to hold said followers apart and to move said followers toward their abutments, and means adapted to cause the inner of said cases to expand and thereby to frictionally engage the outer of said cases as one of the followers is moved toward the other, and simultaneously Y to cause the outer of said cases to move inwardly.

7. In a draft-rigging, the combination with a pair of followers and abutments therefor, of a pair of split friction'oases disposed between said followers and adapted to slide one within the other as the followers approach each other, spring means tending to hold said followers apart and tolmove'said follow 'erstoward their abutments, and means inter posed l'betwee'n said spring means. andethe;

split friction cases 'tendingto cause the outer,

' of said cases'toelose upon the inner case as one of tliefol-lowers is caused to move toward the other. q v p 8. In a draft-rigging,- the combination of a pair of followers,1abutments forsaid follow ers, fulcrumed members disposed betweent" said followers and adapted toslide upon each other as the followers approach each other, and spring means located between saidfol end of the other lever, and sprin means lowers and adapted to'bear upon said ful-.-.:, crumedjmembers and thereby to cause the same to swing about their fulcrum each a adapted to rock said levers'on their lcrums into engagement with each other, said spring means being so arranged as to be compressed by the movement of one of the followers toward the other of said followers.

10. In a draft -rigging, the combination with a draw-bar, of a pair of followers adapted to approach each other when the draw-' bar'is moved longitudinally," a spring dis-- posed between the followers, a pair of fulcrumed bent levers having each i anarm adapted to receive the thrust of the spring and another arm tending to approach the corresponding arm of the other lever, and a.

second pair of bent levers likewise having each'an arm adapted to receive the thrust of the spring, the other arms of said second pair of levers tending to move away from each other and into engagement with the approaching arms of said first pair of levers.

- 11. In a draft-rigging, the combination with a draw-bar, of a follower adjacent the inner end of said draw-bar, a second follower, a yoke secured to the draw-bar and embracing said followers, abutments for said followers, a spring interposed between said follo'wers and adapted to be compressed by the movement of either of said followers toward the other, a pair of levers having each an arm adapted to receive the thrust of thespring' and another arm tending to approach the opposed arm of the otherdver, and a pair of levers having each an arm adapted to receive the thrust of the spring and another tendin to move away from the corresponding arm 0 the other lever and into engagement with the second-named arms of the other pair of levers.

12. In a draft-rigging, the combination with a draw-bar, of a pair of followers arranged to approach each other when the draw-baris moved longitudinally, a spring i. do

I with'a-draW-bar, of

therewith and tending to separate saidfollowe rsy means adapted to be expanded by said spring and means adapted'to be compressed by said spring, said first-named means being arranged to telescope within said lastnamed means as the followers are caused to approach each other.

13,111 a draft-rigging, the combination an inner friction-case, an outer split friction-case comprising rocking devices having members rigidly connected engaging with the inner case, a spring tending torock said rocking devices toward each other and so contract the outer friction-case and cause the same to frictionally engage the inner friction-case, and means whereby longitudinal movement of the draw-bar increases the pressure exerted by said spring, and, at the same time, causes relative movement between said frictioncases.

14. In a draft-rigging, the combinationl witli a draw-bar, of an outer split-frictioncase, an inner split friction-case, spring means tending to expand the inner and to contract the outer of said friction-cases, and means whereby longitudinal movement of the draw-bar causes relative movement between said friction-cases and alsoincreases the pressure exerted by said spring.

15. Draft-rigging comprising a draw-bar, a pair of friction cases adapted to telescope one within the other, means for connecting said friction cases with the draw-bar, spring means within said friction cases, and means interposed between said spring means and the friction cases whereby through the action of the spring the outer of said cases is caused to close upon the inner of said cases.

- JAMES R. .RENIFE.

Witnesses:

G. Y. SKINNER, C. L. HOPKINS. 

